1. D. W. Crowe, “Introduction to the plane symmetries,” Symmetry Comes of Age: The Role of Pattern in Culture, D. K. Washburn and D. W. Crowe, eds. University of Washington Press, 2004, pp. 3–18.
2. L. Fernando-Amilbangsa, Visual Arts of the Sulu Archipelago, Ateneo de Manila University Press, Quezon City, 2005.
3. P. Gerdes, “Symmetries on mats woven by Yombe women from the Lower Congo: On the Interplay Between Cultural Values and Mathematical-Technical Possibilities,” Symmetry Comes of Age: The Role of Pattern in Culture, D. K. Washburn and D. W. Crowe, eds. University of Washington Press, 2004, pp. 81–98.
4. H. H. Miller, J. F. Minier, U. S. Andes, T. Muller, and A. Brezina, Philippine Mats, Bureau of Printing, Manila, 1913, http://www.gutenberg.org/ebooks/30850 .
5. J. F. Rigby, “Precise Colourings of Regular Triangular Tilings,” Math. Intelligencer 20, no 1 (1998) 4–11.